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Chapter 1: Q22. (page 30)

Evaluate each expression if a=-5,b=6 and c=2.8

4a+7

Short Answer

Expert verified

The absolute value of expression is13.

Step by step solution

01

Step1- Order of evaluation

To evaluate any expression involving one operation, follow the below order of operation

  • First replace the algebraic expression inside the grouping symbols like matrix brackets ( ) with numeric expression
  • Perform the multiplication inside the bracket
  • Perform the addition inside the bracket
  • Evaluate the absolute value
02

Step2- Simplify the expression inside grouping symbol

To evaluate the value of given expression , simply the expression inside the bracket and then find the absolute value of expression as shown below

4a+7=4脳-5+7=-13

03

Step3- Find the absolute value of expression inside the bracket

The absolute value of -13=13.

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